Classes in this phylum include Polyplacophora, while another organism in this phylum is the geoduck [GOOEY-duck]. Many classes in it have a broad muscular foot and a scraping 
Classes in this phylum include Polyplacophora, while another organism in this phylum is the geoduck [GOOEY-duck]. Many classes in it have a broad muscular foot and a scraping tongue called a radula. All organisms in this phylum exhibit bilateral symmetry and contain a mantle cavity, and it includes the largest invertebrate, the colossal squid.  For 10 points, name this diverse invertebrate phylum that includes clams, snails, and octopuses.
Classes in this phylum include Polyplacophora, while another organism in this phylum is the geoduck [GOOEY-duck].
{mollusks} [accept {mollusca}]